Driver

Abstract

In a tubular guide part provided in a housing of a driver, a gas pressure accumulation member formed by filling compressed air in a bellows is provided. An actuating piston is detachably attached to a lower end surface of the gas pressure accumulation member. On a lateral surface of the actuating piston, latched parts and are provided so as to be arranged in a vertical direction. A driver blade is attached to an attachment part provided at a lower end surface of the actuating piston. When a cam is rotated to sequentially engage latching parts and with the latched parts and, the actuating piston is moved to the upper side. When the latching part is detached from the latched part, the actuating piston is moved downward by repulsive force of the compressed gas, and a nail is driven by the driver blade.

1 - 9 . (canceled) 
     
     
         10 . A driver comprising:
 a gas pressure accumulation member;   actuation mechanism which compresses the gas pressure accumulation member and then releases the compression; and   a driver blade disposed to outside of the gas pressure accumulation member and striking a fastener in conjunction with the release of the compression of the gas pressure accumulation member, the driver blade being detachable from the gas pressure accumulation member.   
     
     
         11 . The driver according to  claim 10 , wherein
 the gas pressure accumulation member is formed by filling compressed gas in a bellows, and   the driver blade is attached to an actuating piston which is detachably disposed on the gas pressure accumulation member.   
     
     
         12 . The driver according to  claim 11 , wherein
 the actuation mechanism includes:   at least a latched part provided on the actuating piston;   a rotor rotated by a power of a motor; and   at least a latching part provided on the rotor.   
     
     
         13 . The driver according to  claim 10 , wherein
 the actuation mechanism includes:   an inner piston which penetrates through the gas pressure accumulation member and is configured to be expansible/shrinkable together with the gas pressure accumulation member in a direction of the penetration;   a wire which is fixed to a movable part of the inner piston;   a wind-up body which winds up the wire;   a wind-up mechanism which rotates the wind-up body by a power of a motor; and   shut-off means which shuts off transmission of the power of the motor by the wind-up mechanism.   
     
     
         14 . The driver according to  claim 10 , wherein
 the gas pressure accumulation member is formed of an accordion-like bellows having elasticity.   
     
     
         15 . The driver according to  claim 14 , wherein
 the gas pressure accumulation member has an intermediate ring wound around a small-diameter part of the accordion-like bellows.   
     
     
         16 . The driver according to  claim 10 , wherein
 the gas pressure accumulation member is made up of a pressure accumulation cylinder which contains compressed gas and a pressure accumulation piston which is moved forward/backward in the pressure accumulation cylinder, and   the driver blade is fixed to an actuating piston detachably attached to a distal end surface of the pressure accumulation piston.   
     
     
         17 . The driver according to  claim 16 , wherein
 the pressure accumulation piston is a bottomed tubular body having an approximately U shape cross section.   
     
     
         18 . The driver according to  claim 11 , wherein
 the driver blade has a base end part mated in a mating hole formed in the actuating piston, and   the driver blade is attached to the actuating piston by mating a pin in a through hole penetrating through the actuating piston and the base end part.